Hydraulic control circuit for a delimbing apparatus
OwnerThomas H. Hudsoninventor
Life of this patent
Estimating the term…
Abstract
A hydraulic control circuit for uniform controlled movement of stripping and guiding arms in a tree delimbing apparatus. A pair of flow divider combiner valves allow equal amounts of pressurized fluid to communicate with and actuate said cylinders. The piston rods of said cylinders are mechanically coupled to rotate tubular sleeve members with affixed stripping and guide arms between outward and inward positions. The flow divider combiner valves provide equal rates of said fluid to flow to said cylinders to insure said piston rods and mechanically affixed stripping arms and guide arms are moved at equal rates of speed. Thus the stripping levers and guide arms open and close about a felled tree in a uniform manner for delimbing operations.
Claims6
Apparatus for delimbing felled trees comprising:
- (a) a plurality of stripping arms and guide arms arranged in pairs in spaced relation, each pair being mounted for pivotal movement about parallel axes such that each arm of said pair moves between a closed position proximal the other arm of said pair and an open position distal the other arm of said pair;
- (b) hydraulic means for selectively moving said arms of said pair to said open and closed positions;
- and
- (c) means for controlling said moving means such that each of said arms of said pairs moves concomitantly with each other arm to simultaneously engage and disengage said felled trees disposed therebetween.
Dependencies are inferred from the claim text.